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Why Is My Kitchen Faucet Dripping at the Base?

A dripping kitchen faucet base is usually caused by a worn O-ring or loose mounting nut. Fix it in under 30 minutes without calling a plumber.

Category:Plumbing
Difficulty:Easy
Time:30 min
Success:50%
Updated:Jun 24, 2026

quick_referenceQuick Answer

For Why Is My Kitchen Faucet Dripping at the Base?, start with "Turn off water supply and drain lines": Locate the shutoff valves under the sink and turn them clockwise to close. Open the faucet handle to release any remaining water pressure. Stop DIY if the faucet body is cracked or corroded. This is listed as a easy recovery and usually takes about 30 min.

verifiedGuide Snapshot

Repair areaPlumbing
Estimated time30 min
DifficultyEasy
Stop conditions3

Last updated Jun 24, 2026. Review the stop conditions before continuing.

account_treeRecovery State

DeviceKitchen Faucet
Current stateLeak
Specific stateBase Drip
Failed stepO Ring Wear
Likely failure typeWorn Part
DIY boundaryDIY recovery first
paymentsCost decision

help1. Understand the Problem

The base of a kitchen faucet drips when the O-ring or seal that sits between the faucet body and the sink deck wears out. Over time, mineral buildup and constant movement degrade the rubber, allowing water to seep out. This is a common issue on pull-down and gooseneck faucets, often noticed after several years of use.

build_circle2. Try This First

Best First Step
Turn off water supply and drain lines

Turn off water supply and drain lines

Locate the shutoff valves under the sink and turn them clockwise to close. Open the faucet handle to release any remaining water pressure.

visibility3. Visual Guidance

See what's happening and how to try the first recovery step.

1
Remove the faucet handle
Remove the faucet handleUse a hex key or screwdriver to remove the handle set screw. Pull the handle straight up to expose the faucet body.
2
Unscrew the mounting nut
Unscrew the mounting nutUse a basin wrench to loosen and remove the large mounting nut that secures the faucet to the sink deck. Support the faucet from above.
3
Lift the faucet and replace the O-ring
Lift the faucet and replace the O-ringLift the faucet body slightly to access the old O-ring at the base. Pry it out with a small flathead screwdriver and press a new, identical O-ring into the groove.
4
Reassemble and test for leaks
Reassemble and test for leaksReinstall the faucet, tighten the mounting nut, replace the handle, turn the water supply back on, and check for drips at the base.

autorenew4. If That Doesn't Work

Try the next recovery options.

Replace the entire faucet cartridgeIf the O-ring replacement doesn't stop the drip, the cartridge may be worn. Replace it with a manufacturer-compatible cartridge.
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Frequently Asked Questions

Can I use plumber's tape on the O-ring?expand_more
No, plumber's tape is for threaded connections. The O-ring needs a clean, dry fit. Apply a thin layer of silicone plumber's grease to help it seat properly.
How do I know what size O-ring to buy?expand_more
Remove the old O-ring and take it to a hardware store for matching. Many faucet brands sell O-ring repair kits that include common sizes.
Will the drip damage my sink cabinet?expand_more
Yes, a persistent drip can cause water stains, warping, and mold in the cabinet below. Fix it promptly to avoid costly cabinet repairs.

warning5. Stop DIY If

Don't continue if any of these apply.

reportThe faucet body is cracked or corroded
reportThe mounting nut is stripped and won't tighten
reportYou see water pooling inside the cabinet after tightening
Still stuck?Get personalized help with AI Recovery.

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This page provides general DIY guidance.
If you're unsure, it's always best to consult a professional.